Photographic-shutter casing.



PATENTED JULY'17, 1905.

E. w. PARKER.

PHOTOGRAPHIG SHUTTER CASING.

APPLICATION FILED 13:60.27, 1904.

n: MORRIS PETERS smnorou, D. c

UNITED SATES PATENT OFFICE.

PHOTOGRAPHlC-SHUTTER CASING- Specification of Letters Patent.

Patented July 17, 1906.

Application filed December 27, 1904:. Serial No. 238,305.

To all whom, it may concern:

Be it known that I, EDWIN W. PARKER, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Photographic-Shutter Casings, of which the following isa specification.

The present invention relates to casings for photographic shutters, andhas for its 0b- .iect to provide a device of this character which shallbe stronger, more durable, more easily assembled, and less expensive tomanufacture than are those devices of this character now in use.

At the present time shutter-casings usually consist of short cylindricalmetal boxes having two principal parts, one of which is a flat platehaving a cylindrical flange or rim and the other a plate adapted to besecured to the flange, these parts having provisions for holding thelens of the camera and the mechanism of the shutter. Such casings arediflicult and expensive to manufacture, as it is hard to form such along flange as is necessary upon one of the casing members, and also thebarrels or cylinders of the pumps by which the shutter mechanism isoperated are attached to the casing by means of brackets,

which sometimes are not sufficiently secure and at any time are liableto become loose and give trouble.

By my invention I have constructed a casing consisting, essentially, oftwo plates, each of which is provided with a cylindrical flange, andwhen the parts are assembled to make the complete casing the flangesmeet and a cylindrical box results which is divided on a linesubstantially midway of its longi tudinal extent. Also a novel means forsecuring the pump-barrels to the casing is provided.

Of the accompanying drawings, Figure 1 represents an elevation of ashutter-casing constructed according to my invention. Fig. 2 representsa plan view of the shutter-casing as seen from above. Figs. 3 and 4represent sectional views on a somewhat enlarged scale, taken on lines 33 and 4 4, respectively.

.Fig. 5 represents a fragmentary elevation of a portion of one of thecasing members, showing the inside of the casing with one of thepump-cylinders in section in the position it occupies relatively to thecasing when the parts are assembled. Fig. 6 represents a perspectiveview of one of the pump-cylinders.

The same reference characters indicate the same parts in all thefigures.

a and b are the two main members of which the casing is made, and eachof these members consists of a substantially flat plate a b and aperipheral flange a 6 which is preferably cylindrical, although notnecessarily so. The flanges may be made separately and secured to theplates in any approved manner, or they may be formed integral with theplates, which is the preferred construction. The two flanges are ofequal diameter, and in assembling the parts of the casing are placedwith their projecting edges in contact and are held together by means ofbolts 0, extending through one of the plates and threaded into theother. Preferably the flanges o and b are of the same height, so thatneither will need to be of excessive extent, and the labor anddifliculty of drawing the flanges will be reduced to the minimum. One ofthe flanges, as (1 is provided with an extension or lip d, ofslightly-larger diameter, projectin from the outer edge and extendingover the ange b of the other member of the casing. This lip constitutesa guide for retaining the members in proper relation while they arebeing assembled.

The pump barrels or cylinders are designated by c 6, one of them beingthe cylinder to which the bulb is connected and having a piston foroperating the shutter mechanism, while the other contains theretarding-piston, by which an exposure of an appreciable length of timeis secured.

In ordinary constructions the pump-barv rels are secured to the casingby bracketsbrazed or otherwise connected thereto; but by my invention Ihave provided an improved method of attachment which is simpler to makeand is more durable, while at the same time the ease with which thepumpbarrels may be secured to the casing is greatly increased. Onopposite sides of the casing in the cylindrical portions of the casingmembers are formed recesses f of a shape such as to receive a portion ofa pump-barrel placed alongside the casing with its axis extendin in adirection at right angles to the axis of the casing. The reatest widthof the recesses is practically t e same as the diameter of the pump-barrel to be placed therein, so that when the pump-barrels are assembledwith the casing members approximately half of the width of the barrelswill extend into the casing. It is not essential that the pump-barrelshould extend exactly to this amount into the casing; but the construction which permits this is preferred, as thereby the greatestfirmness is secured.

Each pump-barrel is gripped between the flanges of the casing membersand is retained securely by means of a plate g of approximatelyelliptical shape securely fastened to the exterior of the pump-barreland curved to conform to the curvature thereof, its exact outline beingthe same as that of the periphery of the recess in which the pump-barrelis placed. In assembling the parts the pumpbarrel is placed with theplate 9 extending into the interior of the casing, with its edgesengaging against the flanges of the casing members around the peripheryof the recess upon the inside. The flanges a b are brought togetheroutside of the plate g, and the casing members are secured together bythe bolts 0. Thus as the plate 9 contained within the casing is greaterin lateral extent than the area of the recess in which the pump barrelis held it is obvious that the latter cannot be removed as long as thecasing members are bolted together unless the plate {1 is pulled off orthe flanges broken, and that also the joint or narrow opening betweenthe barrel and the casing is covered by the edges of the plate, wherebylight and dust are efl'ectually prevented from passing through suchjoint into the interior of the casing. The casing members are providedwith the usual apertures h i for admitting light and provisions formounting a lens. The portion of each pump-cylinder projecting into thecasing is formed with a slot 7c, through which the portion of theshutter mechanism to be en gaged by the pump-piston is permitted toextend.

I claim 1. A photographic-shutter casing comprising a pair of plateshaving oppositely-extended flanges meeting at their edges, means forholdin said plates together, and pump-cylinders held between portions ofsaid flanges.

2. A casing for a photographic shutter divided on a line approximatelymidway of its longitudinal extent into two members, each of said memberscomprising in part a rim or flange extended toward the other member andin engagement with the flange of the other member when said members areassembled, said flanges having recesses for receiving a portion of apump-cylinder.

3. A casing for a photographic shutter divided on a line approximatelymidway of its longitudinal extent into two members, each of said memberscomprising in part a rim or flange extended toward the other member andin engagement with the flange of the other member when said members areassembled, and means for retaining said flanges in alinement, saidflanges having recesses for receiving a portion of a pump-cylinder.

4. A casing for a photographic shutter divided on a line substantiallymidway of its longitudinal extent into two members, each of said memberscomprising in part a rim or flange extended toward the other member andin engagement with the flange of the other member when said members areassembled, and an external annular bead connected to the flange of oneof said members adjacent its edge arranged to engage and surround aportion of the flange of the other member.

5. A photographic-shutter casing consisting of a plurality of members, apump-barrel, and a projection mounted on said barrel extending betweenadjacent portions of the casing members and gri ped thereby.

6. A photographic-s iutter casing having an aperture in its side, apumpbarrel, and means extending into the aperture for connectin thepump-barrel with a portion thereof, said connecting means bein arrangedto exclude dust and light from said aperture.

7. A photographic-shutter casing having an aperture in its side, apump-barrel, and means extending into the aperture for connecting thepump barrel with a portion thereof comprising a projection mounted onthe pump-barrel and arranged to engage the edges of the aperture on theinside of the easing.

8. A photographic-shutter casing consisting of members havingoppositely-extending engaging flanges constituting the sides of thecasing, said sides being recessed to form an aperture, a pump-barrel,and a plate mounted on the barrel arranged to engage the edges of theaperture on the inside of the casing and to be gripped and held in placeby the casing members when they are assembled.

9. A photographic-shutter casing consisting of members havingoppositely-extending engaging flanges constituting the sides of thecasing, said sides being recessed to form an aperture, a pump-barrel, aplate mounted on t 1e barrel arranged to engage the edges of theaperture on the inside of the casing and to be gripped and held in placeby the casing members when they are assembled, and means for holding theflanges of said members in alinement.

10. A photographic-shutter casing consisting of members havingoppositely-extending engaging flanges constituting the sides of thecasin said sides being recessed to form an apert iire, a pumpbarrel, aplate mounted on the barrel arranged to engage the edges of the I Intestimony whereof I have afiixed my apertuae on1 tihei (inside of 13%)16casing and to be signature in presence of two Witnesses.

grippe an e in p aee y t e easing members when they are assembled, meansfor EDWIN 5 holding the flanges of said members in alinement, and meansfor holding the members together,

Witnesses:

HARRY. Y. NoRwooD, J. OSCAR JARRELL.

